Mold and method for getting foot model thereof

ABSTRACT

A mold stepped on by a foot includes a seat, a plurality of telescopic rods, an image capturing device and an insole material. The telescopic rods are parallel to each other and are disposed in the seat. The telescopic rods stepped on by the foot generate a plurality of restoring forces, respectively. The image capturing device is disposed on the seat. The telescopic rods are captured by the image capturing device to generate a plurality of three-dimensional data of the telescopic rods. The insole material is disposed below the telescopic rods for molding an insole.

RELATED APPLICATIONS

The present application is a Divisional Application of the U.S.application Ser. No. 15/220,381, filed Jul. 26, 2016, now U.S. Pat. No.10,232,577 issued on Mar. 19, 2019, which claims priority to TaiwanApplication Serial Number 104124272, filed Jul. 27, 2015, all of whichare herein incorporated by reference.

BACKGROUND Technical Field

The present disclosure relates to a mold. More particularly, the presentdisclosure relates to a mold and a method for getting a foot modelthereof.

Description of Related Art

An ideal insole should be custom-fit which completely corresponds to theshape of a foot of a user under partial or full weight-bearing. Oneconventional manufacturing procedure for custom-fit insoles is using aplaster casting with an added insert to form the user-specific insolemold. Then, the manufacturer utilizes the insole mold to generate aninsole corresponding to the foot. This conventional custom-fit insolemanufacturing procedure is complex, thereby increasing the manufacturingtime and the manufacturing cost.

Another conventional custom-fit insole manufacturing procedure is usinga digital foot model of the user obtained via a foot shape capturingdevice. The foot shape capturing device works by capturing directly animage of the sole of the foot of the user without the sole contactingthe ground or a weight-bearing surface. Then, a computer connected tothe foot shape capturing device reconstructs the digital foot model viathe image. The manufacturer then utilizes numerically controlledmachining tools to generate an insole according to the digital footmodel. Therefore, such conventional custom-fit insole manufacturingmethods are usually expensive. In addition, when the user stands on theground whether under partial or full weight-bearing, the shape of thefoot and the sole will be changed due to the weight of the user and theuser's stance. Conventional noncontact image-based foot shape capturingdevices do not consider this change of the shape of the foot stepped onthe ground and manual intervention by therapists to correct thealignment of the foot bones also intervenes the image capturing, soinsoles manufactured using conventional methods cannot perfectly matchthe user's foot shape under weight-bearing whether with or without bonealignment corrections. Therefore, it is desirable to develop acustomizable mold that enables low cost and rapid manufacturing ofcustom-fit insoles that completely match the sole of the foot under bodyweight-bearing conditions.

SUMMARY

According to one aspect of the present disclosure, a mold stepped on bya foot includes a seat, a plurality of telescopic rods, an imagecapturing device and an insole material. The telescopic rods areparallel to each other and are disposed in the seat. The telescopic rodsstepped on by the foot generate a plurality of restoring forces,respectively. The image capturing device is disposed on the seat. Thetelescopic rods are captured by the image capturing device to generate aplurality of three-dimensional data of the telescopic rods. The insolematerial is disposed below the telescopic rods for molding an insole.

According to another aspect of the present disclosure, a method forgetting a foot model includes a pressing step, a positioning step, anobtaining mold cavity step and a manufacturing insole step. The pressingstep is for pressing a plurality of telescopic rods of a mold by a footof a user. The positioning step is for positioning the telescopic rodsvia a sliding device. The obtaining mold cavity step is for obtaining amold cavity via the telescopic rods. The manufacturing insole step isfor manufacturing an insole corresponding to the mold cavity via aninsole material.

BRIEF DESCRIPTION OF THE DRAWINGS

The present disclosure can be more fully understood by reading thefollowing detailed description of the embodiment, with reference made tothe accompanying drawings as follows:

FIG. 1 shows a schematic view of mold according to one embodiment of thepresent disclosure;

FIG. 2 shows an exploded view of the mold of FIG. 1;

FIG. 3 shows a cross-sectional view of the mold of FIG. 1;

FIG. 4 shows a cross-sectional view of the mold of FIG. 3;

FIG. 5 shows an exploded view of a sliding device and a positioningmember of the mold of FIG. 2;

FIG. 6 shows a schematic view of the mold stepped on by a foot of FIG.3;

FIG. 7 shows a schematic view of the mold according to anotherembodiment of the present disclosure;

FIG. 8 shows a schematic view of the mold according to further anotherembodiment of the present disclosure;

FIG. 9 shows a schematic view of the mold for capturingthree-dimensional data of FIG. 6;

FIG. 10A shows a schematic view of a relationship between a plurality ofplanes of the telescopic rods of FIG. 6;

FIG. 10B shows a schematic view of a relationship between a plurality ofimage coordinates of a direct linear transformation and a plurality oftop coordinates of the telescopic rods of FIG. 6;

FIG. 11A shows a schematic view of a moving distance of the telescopicrods pressed by the foot of FIG. 10A;

FIG. 11B shows a schematic view of a relationship between the imagecoordinates and the moving distance of FIG. 11A;

FIG. 12 shows a schematic view of a three-dimensional surface of thefoot of FIG. 6;

FIG. 13A shows a flow chart of a method for getting an foot modelaccording to one embodiment of the present disclosure;

FIG. 13B shows a schematic view of n insole taken out from a draweraccording to the method of FIG. 13A; and

FIG. 14 shows a flow chart of a method for getting a foot modelaccording to another embodiment of the present disclosure.

DETAILED DESCRIPTION

FIG. 1 shows a schematic view of a mold according to one embodiment ofthe present disclosure; FIG. 2 shows an exploded view of the mold ofFIG. 1; FIG. 3 shows a cross-sectional view of the mold of FIG. 1; FIG.4 shows a cross-sectional view of the mold of FIG. 3; and FIG. 5 showsan exploded view of a sliding device 600 and a positioning member 700 ofthe mold of FIG. 2. The mold stepped on by a foot includes a seat 100, aplurality of guiding tracks 200, a plurality of positioning grooves 300,a plurality of telescopic rods 400, a plurality of elastic members 500,the sliding device 600, the positioning member 700 and a drawer module800.

The seat 100 includes a base portion 110, a guiding portion 120, ahousing 130 and a space. The base portion 110 is connected to thehousing 130, and includes a hole 112, six concaves 114 and four lockingelements 116. The guiding portion 120 is disposed in the housing 130.The space is located in the base portion 110 and the housing 130. Thespace is corresponding to the foot. The hole 112 is located at one sideof the base portion 110 and is surrounded by the six concaves 114. Thefour locking elements 116 are located at four corners of the baseportion 110, respectively. The guiding tracks 200 are disposed on theseat 100 and have circular shapes. In detail, the guiding tracks 200 aredisposed on the plate-shaped guiding portion 120. The positioninggrooves 300 are disposed on the seat 100 and are corresponding to theguiding tracks 200, respectively.

The telescopic rods 400 are parallel to each other and include aplurality of abutting portions 410, respectively. The abutting portions410 are connected to each other and are disposed in the seat. In detail,each of the abutting portions 410 has an octagonal columnar shape and isconnected to the other corresponding abutting portions 410 arounditself. One end of each of the telescopic rods 400 is passed through andprotruded from each of the guiding tracks 200 for being stepped on bythe foot. The other end of each of the telescopic rods 400 is passedthrough each of the positioning grooves 300. In other words, theabutting portions 410 are movable and located between the guiding tracks200 and the positioning grooves 300 so as to keep the telescopic rods400 in the seat 100.

The elastic members 500 are disposed in the seat 100 for applying aplurality of restoring forces to the telescopic rods 400, respectively.Each of the telescopic rods 400 is passed through each of the elasticmembers 500 and is disposed between the abutting portions 410 and thepositioning grooves 300. In detail, the other end of each of thetelescopic rods 400 is passed through each of the elastic members 500first. Then, the other end of each of the telescopic rods 400 is passedthrough each of the positioning grooves 300, so that the elastic members500 is located between the abutting portions 410 and the positioninggrooves 300. Therefore, the telescopic rods 400 stepped on by the footof a user can generate the restoring forces via the elastic members 500,respectively.

The sliding device 600 includes four tracks 602, a sliding member 604, afirst connecting member 620, a second connecting member 630, a firstpositioning element 660, a second positioning element 670 and a thirdpositioning element 680. The sliding device 600 is disposed on the seat100 for locking the telescopic rods 400. The four tracks 602 aredisposed on the sliding member 604. In detail, the sliding member 604includes a first sliding rod 640 and a second sliding rod 650. Twotracks 602 are disposed on the first sliding rod 640, and the other twotracks 602 are disposed on the second sliding rod 650. An extendingdirection of each of the tracks 602 is non-parallel to an extendingdirection of each of the guiding tracks 200. The sliding member 604 iscorresponding to the abutting portions 410 of the telescopic rods 400.The first sliding rod 640 and the second sliding rod 650 areperpendicularly connected to two opposite sides of the abutting portions410, respectively. The four locking elements 116 of the base portion 110are passed through the two tracks 602 of the first sliding rod 640 andthe two tracks 602 of the second sliding rod 650, respectively, so thatthe sliding member 604 can be moved on the locking elements 116according to the four tracks 602. Moreover, two ends of the firstconnecting member 620 are connected to one end of the first sliding rod640 and one end of the second sliding rod 650, respectively. Two ends ofthe second connecting member 630 are connected to the other end of thefirst sliding rod 640 and the other end of the second sliding rod 650,respectively. In this way, the first connecting member 620, the secondconnecting member 630, the first sliding rod 640 and the second slidingrod 650 are connected together to form a rectangular frame. Therectangular frame can be moved in a Y-axis direction via the positioningmember 700. The first connecting member 620, the second connectingmember 630, the first sliding rod 640 and the second sliding rod 650 aremoved in the same direction. The second sliding rod 650, the firstpositioning element 660, the second positioning element 670 and thethird positioning element 680 are used to lock the abutting portions 410of the telescopic rods 400. The first sliding rod 640 is connected tothe third positioning element 680, and a positioning spring 681 isdisposed between the first sliding rod 640 and the third positioningelement 680. The positioning spring 681 is configured to press the thirdpositioning element 680, so that the third positioning element 680 ismoved in a negative Y-axis direction to position the telescopic rods400. The second sliding rod 650 of the sliding member 604 is movablealong the track 602 in a positive Y-axis direction to press one side ofthe abutting portions 410, and the abutting portions 410 are tightlyconnected to each other so as to position the telescopic rods 400.

In FIG. 5, the first connecting member 620 includes a first inclinedportion 621, and the first positioning element 660 includes a secondinclined portion 661 corresponding to the first inclined portion 621.The second connecting member 630 includes a third inclined portion 631,and the second positioning element 670 includes a fourth inclinedportion 671 corresponding to the third inclined portion 631. In order topress the telescopic rods 400 bi-directionally, the first inclinedportion 621 is engaged with the second inclined portion 661, and thethird inclined portion 631 is engaged with the fourth inclined portion671. By means of horizontal and vertical components of the force of theinclined portions, the first connecting member 620 is moved in thepositive Y-axis direction, so that the telescopic rods 400 are pressedby the first positioning element 660 in a positive X-axis direction. Thesecond connecting member 630 is moved in the positive Y-axis direction,so that the telescopic rods 400 are pressed by the second positioningelement 670 in a negative X-axis direction. In addition, the firstconnecting member 620 and the second connecting member 630 aresymmetrical along the Y-axis direction. The first positioning element660 and the second positioning element 670 are symmetrical along theY-axis direction and are moved in opposite directions. The secondsliding rod 650 and the third positioning element 680 are moved inopposite directions. The first connecting member 620, the secondconnecting member 630, the first positioning element 660 and the secondpositioning element 670 all have three inclined portions. The totalnumber of the inclined portions and a distance between any two adjacentinclined portions can be decided by a manufacturer, and the minimumnumber of the inclined portions must be one.

In FIG. 5, the engagement structure of the sliding device 600 combinedwith the operation of positioning member 700 can provide abi-directional locking mechanism to position the telescopic rods 400.The bi-directional locking mechanism may be divided into a firstdirectional lock and a second directional lock. The first directionallock represents that the first positioning element 660 and the secondpositioning element 670 are moved in the X-axis direction. The seconddirectional lock represents that the second sliding rod 650 and thethird positioning element 680 are moved in the Y-axis direction. Bymeans of the bi-directional locking mechanism, the telescopic rods 400can completely make and maintain a mold cavity corresponding to theshape of the foot. Moreover, an insole mold corresponding to the moldcavity can be manufactured by a plastic material. The insole mold may beused repeatedly, so that a measuring time can be reduced withoutre-measurement.

In FIGS. 2 and 5, the positioning member 700 is disposed on the seat100. The first sliding rod 640 of the sliding member 604 of the slidingdevice 600 is moved in the Y-axis direction by the positioning member700. In detail, the positioning member 700 includes a knob 711 and threespring modules 712. The base portion 110 includes an opening 112 and sixrecesses 114 for disposing the positioning member 700 on the baseportion 110. The positioning member 700 is passed through the opening112 to engage with the first sliding rod 640. In order to screwinglymove and lock the positioning member 700 on the first sliding rod 640,the three spring modules 712 corresponding to the six recesses 114 areutilized to prevent the rotation of the knob 711. Each spring module 712has a spring 713 and a circular convex portion 714. Each circular convexportion 714 is engaged with one of the recesses 114. In other words, thethree circular convex portions 714 of the positioning member 700 areengaged with three of the six recesses 114 of the base portion 110,respectively. When the knob 711 is rotated, the positioning member 700is moved in the Y-axis direction, and the third positioning element 680is moved by the positioning member 700. When the circular convex portion714 of the spring module 712 is engaged with one of the recesses 114 ofthe base portion 110, the spring modules 712 are locked, therebypreventing the knob 711 from rotating. The knob 711 has a flat circularshape and may be easily accessed by the user's fingers.

The abutting portions 410 of the telescopic rods 400 may have anoctagonal shape, a hexagonal shape, a circular shape, a rectangularshape or a square shape. A preferred embodiment of the abutting portions410 employs the octagonal shape to increase the operational stability ofthe abutting portions 410, and the telescopic rods 400 cannot berotated, so that the telescopic rods 400 are more stable. Furthermore,the guiding tracks 200 are disposed on the guiding portion 120. Thepositioning grooves 300, the elastic members 500 and the sliding device600 are disposed in the base portion 110. The base portion 110 isremovably connected to the guiding portion 120, thereby significantlyreducing manufacturing and assembly difficulties.

In FIGS. 2, 3 and 6, the drawer module 800 is used for shaping of aninsole material 830 which can be disposed in the drawer module 800 anddisposed below the telescopic rods 400 for molding an insole. The drawermodule 800 is connected to a bottom of the seat 100. The drawer module800 includes a switch 801 and a drawer 802. The switch 801 is configuredto separate the drawer module 800 from the seat 100 or engage the drawermodule 800 with the seat 100. The drawer 802 includes a handle 804, anaccommodating space 806, a silicone film 810 and a foam material 820.The handle 804 is used to easily pull or push the drawer 802 by theuser. The accommodating space 806 is configured to dispose the insolematerial 830 in the drawer 802. The drawer 802 is configured toconveniently put the insole material 830 into the drawer module 800 ortake out the insole material 830 from the drawer module 800. Inaddition, the silicone film 810 includes a top surface 811 and a bottomsurface 812. The silicone film 810 is disposed in the accommodatingspace 806 of the drawer 802 and is located between the insole material830 and the telescopic rods 400. When the top surface 811 of thesilicone film 810 is pressed by the telescopic rods 400, a plurality ofconcave portions are formed on the top surface 811 and are correspondingto the telescopic rods 400, respectively. The bottom surface 812 istightly connected to the insole material 830. The silicone film 810 isconfigured to prevent the telescopic rods 400 from directly pressing theinsole material 830 due to the silicone film 810 located between theinsole material 830 and the telescopic rods 400. When the top surface811 of the silicone film 810 is pressed by the telescopic rods 400, thebottom surface 812 of the silicone film 810 and the insole material 830exhibit a smooth curve which is corresponding to the shape of the footso as to avoid the insole material 830 forming the concave portionshaving uneven shapes. The foam material 820 is disposed below the insolematerial 830 and is a kind of buffer material. The foam material 820 isused to absorb excessive pressure from the insole material 830.

FIG. 6 shows a schematic view of the mold stepped on by the foot of FIG.3; FIG. 13A shows a flow chart of a method for obtaining the insole moldaccording to one embodiment of the present disclosure; and FIG. 13Bshows a schematic view of an insole taken out from the drawer 802according to the method of FIG. 13A. In FIG. 13A, the method for gettingthe foot model includes a pressing step S11, a positioning step S12, anobtaining mold cavity step S13 and a manufacturing insole step S14. Thepressing step S11 is for pressing the telescopic rods 400 of the mold bythe foot of the user. The telescopic rods 400 are moved in a negativeZ-axis direction by exerting an external force provided by the foot ofthe user. The elastic members 500 which are disposed below thetelescopic rods 400 provide the restoring forces. The external forcegiven by the foot is greater than the restoring forces given by theelastic members 500. The positioning step 812 is for positioning thetelescopic rods 400 via the sliding device 600. The sliding device 600combined with the operation of positioning member 700 provides thebi-directional locking mechanism to tightly position the telescopic rods400. The obtaining mold cavity step 813 is for obtaining a mold cavityvia the telescopic rods 400. The mold cavity is formed above thetelescopic rods 400 and is corresponding to the foot of the user. Themanufacturing insole step 814 is for manufacturing an insolecorresponding to the mold cavity via an insole material 830. The shapeof the insole material 830 is corresponding to the mold cavity. In FIG.13B, the insole material 830 is disposed below the telescopic rods 400for molding the insole and quickly hardens to form the insole. Theinsole material 830 is placed at a proper location corresponding to afoot position. The shape of the insole material 830 is equal to theshape of the foot. The size of the insole material 830 is greater thanor equal to the size of the foot. When the insole is formed by theinsole material 830, the user can pull out the drawer 802 via the handle804 and take out the insole from the drawer 802. The shape of the insoleis equal to the shape of the foot. The size of the insole is greaterthan or equal to the size of the foot. In FIG. 6, the elastic members500 exerts the restoring forces to the telescopic rods 400. When thetelescopic rods 400 are pressed by the foot, the elastic members 500pushes the telescopic rods 400 against the foot of the user by therestoring forces, so that the telescopic rods 400 are tightly connectedto the foot at any time and the mold cavity of the telescopic rods 400is corresponding to an actual deformation of the foot which steps on theground. Even if the user changes the external force exerting on thetelescopic rod 400, the telescopic rod 400 still can be tightlyconnected to the foot at any time via the restoring forces of theelastic members 500.

In FIG. 2, the sliding member 604 can be moved on the locking elements116 according to the four tracks 602. The extending direction of thetrack 602 is non-parallel to the extending direction of each of theguiding tracks 200, so that the second sliding rod 650 and the thirdpositioning element 680 are moved in opposite directions and are tightlyconnected to the abutting portions 410 of the telescopic rods 400. Theabutting portions 410 produces an interlocking connection of thetelescopic rods 400 so as to stably lock the telescopic rods 400 forobtaining the mold cavity. In addition, the insole mold is obtained byan impression of the mold cavity in the plastic material. The shape ofthe plastic material is corresponding to the mold cavity. The insolemold is used to manufacture the insole via the insole material 830.Therefore, the insole corresponding to the foot can be completelymanufactured by the insole mold or the mold.

When the mold cavity shows the user's improper stance, the user's stancecan be adjusted by a professional to match the proper and correctstance. This adjustment changes the movement of the telescopic rods 400,thereby producing the suitable mold cavity and the suitable insole formodifying the users improper stance.

In FIG. 2, the elastic members 500 which are disposed below thetelescopic rods 400 provide the restoring forces. The elastic members500 are disposed in the positioning grooves 300. In other embodiments,the elastic members 500 are disposed above the telescopic rods 400. Twoends of each of the elastic members 500 are connected to the guidingportion 120 of the seat 100 and each of the abutting portions 410 of thetelescopic rods 400, respectively. This structure can achieve the sameeffect as the embodiment of FIGS. 2 and 3.

FIG. 7 shows a schematic view of a mold according to another embodimentof the present disclosure. The difference between the embodiments shownin FIGS. 7 and 1 is that the mold of FIG. 7 further includes a pluralityof light sources 900 which are disposed on the seat 100. Each of thelight sources 900 includes a plurality of lighting elements 910generating a plurality of light colors with different wavelengths,respectively. The lighting elements 910 of each of the light sources 900are arranged according to a moving direction of the telescopic rods 400.The telescopic rods further include a plurality of transparent portions420 which normally extend from the positioning grooves 300 to the top ofthe telescopic rods 400, respectively. The light sources 900 arecorresponding to the transparent portions 420, respectively, and eachlight source 900 generates one of the light colors. When telescopic rods400 are stepped on by the foot, each of the transparent portions 420 iscorresponding to one of the lighting elements 910. In detail, thelighting elements 910 generating the different light colors are arrangedaccording to the moving direction of the telescopic rods 400. When thetelescopic rods 400 are stepped on by the foot, the telescopic rods 400are exerted by the various external forces and are moved the differentmoving distances in the Z-axis direction, so that each of thetransparent portions 420 is aligned to one of the lighting elements 910.Thus, the telescopic rods 400 generate the corresponding light colorsvia the lighting elements 910, respectively. The user can know eachrange of the external forces exerted on the telescopic rods 400according to the light colors through visual observation by the user'seye.

For example, the lighting element 910 generating a red light is disposedbelow 1 cm from the transparent portion 420, and the lighting element910 generating the a yellow light is disposed below 2 cm from thetransparent portion 420. When the moving distance of the telescopic rod400 is 1 cm, the transparent portion 420 is corresponding to thelighting element 910 generating the red light. When the moving distanceof the telescopic rod 400 is 2 cm, the transparent portion 420 iscorresponding to the lighting element 910 generating the yellow light.Hence, the user can know each range of the moving distances of thetelescopic rods 400 according to the light colors through visualobservation by the user's eye. Furthermore, the transparent portion 420of the telescopic rod 400 is made of a transparent material, so that thelight emitted from the lighting element 910 can pass through thetransparent portion 420. The light can be emitted to outside of thetelescopic rods 400, thereby allowing the user to mare easily observethe light colors of the telescopic rods 400.

FIG. 8 shows a schematic view of a mold according to further anotherembodiment of the present disclosure. The difference between theembodiments shown in FIGS. 8 and 1 is that the mold of FIG. 8 furtherincludes a plurality of sensors 920 and a plurality of light sources900. The sensors 920 are connected to the elastic members 500,respectively. The sensors 920 are configured to sense a plurality offorces exerted on the elastic members 500, respectively. The sensors 920may either be mechanical or digital. The sensors 920 are turned on orturned off according, to the telescopic rods 400, respectively. When thesensors 920 obtain the forces exerted on the elastic members 500, theprofessional can know the users stance according to the forces andadjust the user's stance to match the proper and correct stance. Forexample, if the force of the heel is greater than the force of the toe,the professional may suggest the user to move the center of gravitytoward the toe, thereby adjusting the user's stance to match theappropriate stance. Then, the insole or the insole mold correspondingthe appropriate stance can be manufactured by the mold to correct theuser's improper stance.

In FIG. 8, the light sources 900 are connected to and controlled by thesensors 920, respectively. Each light source 900 includes the lightingelements 910 having the light colors with different wavelengths. Thelight sources 900 are corresponding to the telescopic rods 400,respectively. The sensors 900 are configured to sense the forces exertedon the elastic members 500. The lighting elements 910 are turned onaccording to the sensors 920, respectively. Each turned-on lightingelement 910 generates one of the light colors. For example, if thesensors 920 sense 1 N force applied by the elastic members 500, thelighting element 910 generating the red light is turned on. If thesensors 920 sense 2 N force applied by the elastic members 500, thelighting element 910 generating the yellow light is turned on. In thisway, the user can know each range of the external forces exerted on thetelescopic rods 400 according to the light colors of the lightingelement 910 through visual observation.

FIG. 9 shows a schematic view of the mold for capturingthree-dimensional data of FIG. 6; and FIG. 14 shows a flow chart of amethod for getting a foot model according to another embodiment of thepresent disclosure. In FIG. 9, the mold is used for capturing aplurality of three-dimensional data. The mold stepped on by the footincludes a seat 100, a plurality of telescopic rods 400, a plurality oflight sources 900, an image capturing device 1000 and an insole material830. The telescopic rods 400 are parallel to each other and disposed inthe seat 100. The telescopic rods 400 stepped on by the foot generate aplurality of restoring forces, respectively. The light sources 900 aredisposed on the seat 100. The light sources 900 are corresponding to thetelescopic rods 400 and illuminate the telescopic rods 400,respectively. The light sources 900 generate a plurality of light colorsvia the telescopic rods 400, respectively. The image capturing device1000 is disposed on the seat 100. The light colors transmitted throughthe telescopic rods 400 are captured by the image capturing device 1000to generate the three-dimensional data of the telescopic rods 400. Theinsole material 830 is disposed below the telescopic rods 400 formolding an insole. When the insole is formed by the insole material 830,the user can take out the insole from the drawer 802. The imagecapturing device 1000 has an image capturing region which can cover allof tops of the telescopic rods 400.

In FIG. 14, the method for getting the foot model includes a pressingstep 821, a positioning step S22, an image capturing step S23 and acalculating step S24. The pressing step S21 is for pressing thetelescopic rods 400 of the mold by a foot of a user. The positioningstep 822 is for positioning the telescopic rods 400 via a sliding device600. The image capturing step 823 is for capturing an image of thetelescopic rods 400 via an image capturing device 1000. The calculatingstep S24 is for calculating the image to obtain a plurality ofthree-dimensional data of the insole via a processor. Thethree-dimensional data is corresponding to the foot model and the moldcavity. In addition, the abovementioned sensors 920 may be signallyconnected to the processor. The forces exerted on the elastic members500 are obtained by the sensors 920. The data of the forces of thesensors 920 are combined with the three-dimensional data of the insoleto create a database which shows the complete information about theuser's foot. A display device (not shown) can be connected to theprocessor for showing the database.

FIG. 10A shows a schematic view of a relationship between a plurality ofplanes I1, I2, I3 of the telescopic rods 400 of FIG. 6; FIG. 10B shows aschematic view of a relationship between a plurality of imagecoordinates of a direct linear transformation and a plurality of topcoordinates of the telescopic rods 400 of FIG. 6; FIG. 11A shows aschematic view of a moving distance Δd of the telescopic rods 400pressed by the foot of FIG. 10A; FIG. 11B shows a schematic view of arelationship between the image coordinates and the moving distance Δd ofFIG. 11A; and FIG. 12 shows a schematic view of a three-dimensionalsurface A of the foot of FIG. 6. In FIGS. 10A and 10B, there is acorresponding relationship between the image coordinates and the topcoordinates of the telescopic rods 400. The lighting elements 910 of thelight sources 900 generate one of the light colors via the telescopicrods 400 which are arranged in the same column (row). Two adjacent rows(columns) of the telescopic rods 400 generate different light colors,thereby improving the spatial resolution of the force sensing system. Ifthe planes I1 has only one light color, the z-axis values of the topcoordinates of the telescopic rods 400 are equal to each other. In orderto perform the calculating step S24, a plurality of calculatingparameters are established to obtain the three-dimensional data of theinsole in the processor. The calculating parameters includes the topcoordinates of the telescopic rods 400, the relationship between theplanes I1, I2, I3 of the telescopic rods 400, the image coordinates ofthe direct linear transformation, the corresponding relationship betweenthe image coordinates and the top coordinates of the telescopic rods400, the moving distance Δd of the telescopic rods 400 and therelationship between the image coordinates and the moving distance Δd,as shown in FIGS. 10B and 11B.

In the calculating step 824, a position correction between the imagecapturing device 1000 and the telescopic rods 400 is executed first.When the telescopic rods 400 are located at a reference position, one ofthe top coordinates of the telescopic rods 400 can represent P[x,y,z].The processor may obtain the top coordinates of the telescopic rods 400and the relationship between the planes I1, I2, I3 of the telescopicrods 400, as shown in FIG. 10B. Then, the image capturing device 1000captures the image of the light colors transmitted through thetelescopic rods 400. The image coordinate of the image capturing device1000 can represent I[u,v]. The image coordinate I[u,v] is correspondingto the top coordinate P[x,y,z] of the telescopic rods 400. After that, acorrection board having a weight W is put on the tops of the telescopicrods 400 for measuring the image coordinate I′[u′,v′] and the topcoordinate P′[x′,y′,z′] via the moving distance Δd of the telescopicrods 400, as shown in FIG. 11A. The moving distance Δd is correlated tothe weight W of the correction board and an elastic parameter of theelastic members 500. When the top coordinate P[x,y,z] of the telescopicrods 400, the top coordinate P′[x′,y′,z′] of the telescopic rods 400,the image coordinate I[u,v] of the image capturing device 1000 and theimage coordinate l′[u′,v′] of the image capturing device 1000 areobtained, the direct linear transformation (DLT) is performed to obtaina transformation matrix T. The transformation matrix T represents thecorresponding relationship between the image coordinates of the imagecapturing device 1000 and the top coordinates of the telescopic rods400. Moreover, the transformation matrix T represents the focus positionO of the image capturing device 1000 and the other spatial parameters,such as a focal length f, a center position C of an image plane, a zoomratio S, etc. The transformation matrix T and the parameters can bedescribed as follows:

$\begin{matrix}{{\overset{harpoonup}{B} = {\overset{harpoonup}{OI} = \begin{bmatrix}{u - u_{0}} & {v - v_{0}} & {- f}\end{bmatrix}}};} & (1) \\{{\overset{harpoonup}{A} = {\overset{harpoonup}{OP} = \begin{bmatrix}{x - x_{0}} & {y - y_{0}} & {z - z_{0}}\end{bmatrix}}};} & (2) \\{{\because{\overset{harpoonup}{B}// \overset{harpoonup}{A}\Rightarrow{\overset{harpoonup}{B} - {s\;\overset{harpoonup}{A}}} }};} & (3) \\{{\begin{bmatrix}{u - u_{0}} \\{v - v_{0}} \\{- f}\end{bmatrix}_{i,j} = {s \cdot {R\begin{bmatrix}{x - x_{0}} \\{y - y_{0}} \\{z - z_{0}}\end{bmatrix}}_{i,j}}};} & (4) \\{{V = \begin{bmatrix}x_{0} & y_{0} & z_{0}\end{bmatrix}};{and}} & (5) \\{T = {\begin{bmatrix}R & V \\\begin{bmatrix}0 & 0 & 0\end{bmatrix} & 1\end{bmatrix}.}} & (6)\end{matrix}$

Wherein

is one vector between the focus position O and the image coordinatel[u,v] of the image capturing device 1000, and the vector

is corresponding to the image capturing device 1000;

is another vector between the focus position O and the top coordinateP[x,y,z] of the telescopic rods 400, and the vector

is corresponding to the telescopic rods 400; S is a zoom ratio; and Rand V in the transformation matrix T represent a rotation matrix and aposition vector, respectively.

Due to the linear relationship between the vectors

and

, the zoom ratio S is used to describe the linear relationship, as shownn Eq. (3). The transformation matrix T is obtained by performing a leastsquares method, the top coordinates of the telescopic rods 400 and therelationship between the planes I1, I2, I3 of the telescopic rods 400,as shown in Eq. (6). The rotation matrix R and the position vector Vrepresent the corresponding relationship between the image coordinatesof the image capturing device 1000 and the top coordinates of thetelescopic rods 400.

When we know all of the relationships and parameters, any kind of themoving distance Δd of the telescopic rods 400 can be calculated andobtained by the relationships and parameters via the image capturingdevice 1000 and the processor. For example, in FIGS. 11B and 12, thetelescopic rods 400 of the mold is pressed by the foot of the standinguser. The telescopic rods 400 are positioned by the sliding device 600.Then, the top coordinates P′_(i,j) of the telescopic rods 400 and theimage coordinate I′_(i,j) of the image capturing device 1000 arecaptured by the image capturing device 1000. The image capturing device1000 captures the image of the light colors transmitted through thetelescopic rods 400. The corresponding relationship between the imagecoordinates and the top coordinates of the telescopic rods 400 iscalculated by the processor. After executing the position correction andcalculating to obtain Eqs. (1)-(6), the coordinates P′_(i,j) can beobtained by calculating the focus position O and the three coordinatesI_(i,j), I′_(i,j) and P_(i,j). Accordingly, the moving distance Δd ofthe telescopic rods 400 can be obtained by subtracting P′_(i,j) fromP_(i,j). When all of the moving distances Δd of the telescopic rods 400are obtained, the three-dimensional surface A can be generated from themoving distances Δd, as shown in FIG. 12.

When we know the moving distance Δd of the telescopic rods 400, theexternal force F_(i,j) exerted on the telescopic rods 400 by the foot ofthe standing user can be calculated and obtained by Hooke's law. Hooke'slaw is F_(i,j)=k Δd _(i,j), wherein k is an elastic parameter of theelastic member 500.

In one embodiment, the method for getting the foot model furtherincludes an obtaining colormap step. The obtaining colormap step is forobtaining a colormap from the image having the light colors via thelight sources 900. The colormap is corresponding to the external forcesexerted on the foot. In addition, a display device connected to theimage capturing device 1000 and the processor shows thethree-dimensional surface A and the external forces of the foot in realtime, thereby giving the user visual feedback.

According to the aforementioned embodiments and examples, the advantagesof the present disclosure are described as follows.

1. The mold and method of the present disclosure can show thethree-dimensional surface and the external forces of the foot in realtime, thereby giving the user visual feedback.

2. The mold and method of the present disclosure can manufacture aninsole mold corresponding to the mold cavity of the mold. The insolemold may be used repeatedly, so that a measuring time can be reducedwithout re-measurement.

3. The mold and method of the present disclosure can completely make andmaintain a mold cavity corresponding to the shape of the foot via thetelescopic rods. Moreover, an insole mold corresponding to the moldcavity can be manufactured by the plastic material. The insole mold canbe used repeatedly, so that the measuring time can be reduced withoutre-measurement.

4. The mold and method of the present disclosure can use a special shapeof the abutting portions to increase the operational stability of theabutting portions. The telescopic rods cannot be rotated, so that thetelescopic rods are more stable.

5. The mold and method of the present disclosure can utilize the drawerto conveniently put the insole material into the drawer module or takeout the insole material from the drawer module so as to significantlyshorten the manufacturing time.

It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentdisclosure without departing from the scope or spirit of the disclosure.In view of the foregoing, it is intended that the present disclosurecover modifications and variations of this disclosure provided they fallwithin the scope of the following claims.

What is claimed is:
 1. A mold stepped on by a foot, comprising: a seat;a plurality of telescopic rods parallel to each other and disposed inthe seat, wherein the telescopic rods stepped on by the foot generate aplurality of restoring forces; an image capturing device disposed on theseat, wherein the telescopic rods are captured by the image capturingdevice to generate a plurality of three-dimensional data of thetelescopic rods; and an insole material disposed below the telescopicrods for molding an insole.
 2. The mold of claim 1, further comprising:a plurality of light sources disposed on the seat, wherein the lightsources are corresponding to the telescopic rods and illuminate thetelescopic rods, and the light sources generate a plurality of lightcolors via the telescopic rods; wherein the light colors transmittedthrough the telescopic rods are captured by the image capturing device.3. The mold of claim 2, wherein, the telescopic rods comprise aplurality of transparent portions; and each light source comprises aplurality of lighting elements having a plurality of light colors withdifferent wavelengths, the light sources are corresponding to thetransparent portions, respectively, and when telescopic rods are steppedon by the foot, each of the transparent portions is corresponding to oneof the lighting elements.
 4. The mold of claim 2, further comprising: aplurality of sensors turned on or turned off according to the telescopicrods; wherein each light source comprises a plurality of lightingelements having a plurality of light colors with different wavelengths,the light sources connected to the sensors, respectively, the lightsources are corresponding to the telescopic rods, respectively, thelighting elements are turned on according to the sensors, respectively,and each turned-on lighting element generates one of the light colors.